Any Ideas/Help

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Any Ideas/Help

Author	Message
easby	easby posted 9 Years Ago HOT Topic Details
Group: Forum Members Posts: 6, Visits: 44	Any thoughts what is causing this? Part is wet lay then bagged. Thanks Attachments Carbon Part.jpg (600 views, 3.00 MB)
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Fasta	Fasta posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	I would say that this air is fairly normal for a wet laid part and vacuum bagging. If you want good cosmetic parts for wet laid method then the part shape needs to be very simple so that you can remove the air either by rollers, squeegee or even hand massaging the carbon. Then no vacuum is needed. Or change to vacuum infusion. Fastacraft Facebook page
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Hanaldo	Hanaldo posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	As Fasta said, very normal for wet laid parts. Few coats of clear will sort it out.
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Zebra	Zebra posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 14, Visits: 32	Fasta (15/07/2016) I would say that this air is fairly normal for a wet laid part and vacuum bagging. If you want good cosmetic parts for wet laid method then the part shape needs to be very simple so that you can remove the air either by rollers, squeegee or even hand massaging the carbon. Then no vacuum is needed. Or change to vacuum infusion. Nonsense. It is totally possible to achieve a nice finish with parts far more complex than this with a wet lay up. I do it all the time. It's all about the process. Wet the material on a flat smooth surface and squeegee all the air bubbles out before you lay the first layer. Squeegee the cf between 2 layers of smooth material like release liner so you can see that all the air bubbles are removed. Wait until the cf starts to gel and become tacky before removing the release liners and then lay it in the mold. Once the resin has started to gel, no more air bubbles will be able to get into the surface unless your mold surface is not smooth or has cavities. When tacky, the cf will still to the mold nicely which also prevents more air bubbles. If the vacuum is not holding the material in place properly, use a rigid plug to hold the cf against the mold and, if needed, use C clamps to apply pressure. Good luck
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Rovinmosin	Rovinmosin posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 4, Visits: 97	Can you use a rigid a plug with the infusion process as well or would it affect the resin flow?
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Hanaldo	Hanaldo posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	You can use a rigid plug as long as it's on top of the flow mesh and is hard enough to not crush the cells created by the flow mesh and impede flow. A high durometer silicone works well. The downside is it takes a little bit of messing around. Some moulds may be a bit too complex for it and it will cut flow, so you need to revise the intensifier design. You also need to make sure you account for the stack thickness so that the plug sits completely inside the stack layup without bridging anywhere. It can be a bit thicker than you might expect.
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